CN204305376U - A kind of PTC electric heater - Google Patents
A kind of PTC electric heater Download PDFInfo
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- CN204305376U CN204305376U CN201420666681.0U CN201420666681U CN204305376U CN 204305376 U CN204305376 U CN 204305376U CN 201420666681 U CN201420666681 U CN 201420666681U CN 204305376 U CN204305376 U CN 204305376U
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Abstract
The utility model discloses a kind of PTC electric heater, belong to automobile accessories device technique field; Comprise performance loop and control loop; control loop comprises the operating temperature for testing loop of connecting successively and controls the attemperating unit of control loop break-make, for controlling the control section of the circuit switch of performance loop break-make; performance loop comprises the PTC heater of series connection, the controlled components of circuit switch and circuit protecting switch; performance loop and the equal external direct current power supply of control loop; also comprise for the overtemperature short switch closed when the temperature of PTC heater reaches threshold value, overtemperature short switch is connected in parallel on the two ends of PTC heater.Conducting always that attemperating unit lost efficacy or circuit switch breaks down; when PTC heater is heated to dangerous temperature; overtemperature short switch can be directly closed to make performance loop short circuit, and then circuit protecting switch place is disconnected, and ensured the safety of electric heater and neighbouring device.
Description
Technical field
The utility model relates to automobile accessories device technique field, particularly a kind of PTC electric heater.
Background technology
PTC (Positive Temperature Coefficient, positive temperature coefficient temperature-sensitive) heater is widely used in new forms of energy car, is mainly used in glass defrosting, except functions such as hot blasts.
Existing PTC electric heater, primarily of the performance loop composition of the control loop and band PTC heater and fuse of being with temperature detect switch (TDS) and relay, by Vehicular direct-current power supply for control loop and performance loop provide power supply, after temperature detect switch (TDS) in control loop is closed, control loop is communicated with the contact adhesive in relay then, performance loop is communicated with, and PTC heater starts heat supply of generating heat.
But realizing in process of the present utility model, inventor finds that prior art at least exists following problem:
There is the possibility lost efficacy in the temperature detect switch (TDS) of existing PTC electric heater, also there is the bonding situation in contact in the relay for controlling performance loop break-make, in both cases, performance loop can remain connection, PTC heater meeting continuous heating is to very high temperature, thus the device destroyed near PTC heater, there is potential safety hazard.
Utility model content
In order to solve the problem of prior art, the utility model embodiment provides a kind of PTC electric heater, and technical scheme is as follows:
The utility model embodiment provides a kind of PTC electric heater; described electric heater comprises performance loop and control loop; described control loop comprise connect successively for detecting the operating temperature of described performance loop and controlling the attemperating unit of described control loop break-make and the control section for the circuit switch that controls described performance loop break-make; described performance loop comprises the PTC heater of series connection, the controlled components of described circuit switch and circuit protecting switch; described performance loop and the equal external direct current power supply of described control loop
Described electric heater also comprises for the overtemperature short switch closed when the temperature of described PTC heater reaches threshold value, and described overtemperature short switch is connected in parallel on the two ends of described PTC heater.
Further, described overtemperature short switch is the thermal switch with mechanical contact.
Further, described overtemperature short switch comprises temperature sensor, controller and electric-controlled switch, described temperature sensor is electrically connected with described controller, described controller is electrically connected with described electric-controlled switch, described electric-controlled switch is connected in described control loop, and described temperature sensor is arranged near described PTC heater.
Further, described circuit protecting switch is fuse or air switch.
Further, described attemperating unit is the thermal switch with mechanical contact.
Further, described attemperating unit comprises temperature sensor, controller and electric-controlled switch, described temperature sensor is electrically connected with described controller, described controller is electrically connected with described electric-controlled switch, described electric-controlled switch is connected in described control loop, and described temperature sensor is arranged near described PTC heater.
Further, described temperature sensor is semiconductor temperature sensor or resistance temperature detector or heat-sensitive type temperature sensor.
Further, described circuit switch is relay or automatically controlled semiconductor switch.
The beneficial effect of the technical scheme that the utility model embodiment provides is:
By the two ends of the PTC heater in performance loop overtemperature short switch in parallel; even if occur that attemperating unit lost efficacy or circuit switch breaks down the situation of conducting always; when PTC heater is heated to dangerous temperature; overtemperature short switch can be directly closed to make performance loop short circuit; and then circuit protecting switch place is fused or disconnects; performance loop disconnects, and PTC heater begins to cool down, and has ensured the safety of electric heater and neighbouring device.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of the PTC electric heater that the utility model embodiment 1 provides.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, the utility model embodiment is described in further detail.
Embodiment
See Fig. 1, the utility model embodiment provides a kind of PTC electric heater, can be arranged in new forms of energy car, for providing hot blast in car and defrosting etc. to glass for vehicle window, this electric heater comprises performance loop 1 and control loop 2, control loop 2 comprises the operating temperature for testing loop of connecting successively and controls the attemperating unit 21 of control loop break-make, and for the control section 22a of the circuit switch 22 that controls performance loop break-make, performance loop 1 comprises the PTC heater 11 of series connection, the controlled components 22b of circuit switch 22 and circuit protecting switch 12, performance loop 1 and control loop 2 all external direct current power supplies, wherein, this electric heater also comprises for the overtemperature short switch 13 closed when the temperature of PTC heater 11 reaches threshold value, overtemperature short switch 13 is connected in parallel on the two ends of PTC heater 11.
Particularly, performance loop 1 is the heating work loop of PTC electric heater, mainly through heating with distribute heat to the PTC heater 11 in loop, realize promoting vehicle interior temperature and be the function of vehicle window defrosting, circuit protecting switch 12 is for disconnecting voluntarily when being short-circuited at performance loop 1 or fusing, to reach the object of protection circuit; Control loop 2 is mainly used in detecting the temperature of PTC heater 11, controls the break-make of performance loop 1 according to the temperature detected, and to reach the object controlling vehicle interior temperature, the power supply of performance loop 1 and control loop 2 is Vehicular direct-current power supply.
Attemperating unit 21 plays the effect of a temperature sensor and line switching, circuit switch 22 comprises control section 22a and controlled components 22b, control section 22a is connected in control loop 2, controlled components 22b is connected in performance loop 1, when attemperating unit 21 detects the temperature of PTC heater 11 lower than certain low temperature threshold values, attemperating unit 21 is closed makes control loop 2 be communicated with, now the control section 22a of circuit switch 22 controls controlled components 22b connection after being energized, and then cause the circuit of performance loop 1 to be communicated with, PTC heater 11 be energized after start heating heat radiation and persistently overheating, when the temperature of PTC heater 11 reaches certain high temperature threshold values, attemperating unit 21 disconnects and control loop 2 is disconnected, the control section 22a place dead electricity of circuit switch 22 causes controlled components 22b to disconnect, thus causing performance loop 1 to disconnect, PTC heater 11 place loses power supply and begins to cool down and no longer dispel the heat, when occurring that attemperating unit 21 lost efficacy (accurately can not respond to the variations in temperature at PTC heater 11 place), or the controlled components 22b of circuit switch 22 break down the situation of conducting always (performance loop 1 always keep be communicated with) time, PTC heater 11 can be persistently overheating to a dangerous temperature, device around easy damage heater, the two ends that overtemperature short switch 13 is connected in parallel on PTC heater 11 are also as the effect of a temperature sensor and line switching, when the temperature of PTC heater 11 reaches certain danger threshold, overtemperature short switch 13 closes, performance loop 1 short circuit current protection switch 12 place blows, performance loop 1 disconnects, ensure the safety of electric heater and neighbouring device.
Further, overtemperature short switch 13 can be the thermal switch with mechanical contact.
Further, overtemperature short switch 13 can comprise temperature sensor, controller and electric-controlled switch, and temperature sensor is electrically connected with controller, and controller is electrically connected with electric-controlled switch, electric-controlled switch is connected in control loop, and temperature sensor is arranged near PTC heater 11.
Particularly, in this implementation, by the temperature value of temperature sensor Real-time Obtaining PTC heater 11, and temperature value signal is transferred to controller processes, controller judges the temperature conditions of now PTC heater 11 by the relation comparing this temperature value and low temperature threshold and high temperature threshold value, and then control the break-make of electric-controlled switch, finally reach the object regulating PTC heater 11 temperature to reduce or raise.
Further, circuit protecting switch 12 can be fuse or air switch.
Particularly, fuse refers to when the electric current in circuit exceedes setting, with the heat that fuse itself produces, the melt of fuse is fused, and then a kind of electrical equipment of disconnecting circuit; Air switch has another name called air-break, as long as be that in a kind of circuit, electric current exceedes the switch that rated current will disconnect automatically, they can disconnect when the performance loop 1 of electric heater is short-circuited with protection circuit automatically.
Further, in a kind of implementation of the present embodiment, attemperating unit 21 can be the thermal switch with mechanical contact.
Further, in another implementation of the present embodiment, attemperating unit 21 can comprise temperature sensor, controller and electric-controlled switch, temperature sensor is electrically connected with controller, controller is electrically connected with electric-controlled switch, electric-controlled switch is connected in control loop, and temperature sensor is arranged near PTC heater 11.
Particularly, in this implementation, by the temperature value of temperature sensor Real-time Obtaining PTC heater 11, and temperature value signal is transferred to controller processes, controller judges the temperature conditions of now PTC heater 11 by the relation comparing this temperature value and low temperature threshold and high temperature threshold value, and then control the break-make of electric-controlled switch, finally reach the object regulating PTC heater 11 temperature to reduce or raise.
Further, circuit switch 22 can be relay with mechanical contact or automatically controlled semiconductor switch.
Particularly, the relay with mechanical contact utilizes the closed of its contact or disconnects the break-make realizing control circuit, and namely contact controls; It is utilize the conducting of semiconductor element or cut-off to carry out realizing circuit to control that semiconductor exports, i.e. system without deaerator, the operation principle of these two kinds of circuit controling switch is different, but can play the effect controlling performance loop 1 break-make well.
Further, above-mentioned overtemperature short switch 13 and attemperating unit 22 are when the form that the electronic logic using sensor, controller and electric-controlled switch to combine controls, and temperature sensor wherein can be semiconductor temperature sensor or resistance temperature detector or heat-sensitive type temperature sensor.
A kind of PTC electric heater that the embodiment of the present invention provides; by the two ends of the PTC heater in performance loop overtemperature short switch in parallel; even if occur that attemperating unit lost efficacy or circuit switch breaks down the situation of conducting always; when PTC heater is heated to dangerous temperature; overtemperature short switch can be directly closed to make performance loop short circuit; and then circuit protecting switch place is fused or disconnects; performance loop disconnects; PTC heater begins to cool down, and has ensured the safety of electric heater and neighbouring device.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (8)
1. a PTC electric heater; described electric heater comprises performance loop and control loop; described control loop comprise connect successively for detecting the operating temperature of described performance loop and controlling the attemperating unit of described control loop break-make and the control section for the circuit switch that controls described performance loop break-make; described performance loop comprises the PTC heater of series connection, the controlled components of described circuit switch and circuit protecting switch; described performance loop and the equal external direct current power supply of described control loop; it is characterized in that
Described electric heater also comprises for the overtemperature short switch closed when the temperature of described PTC heater reaches threshold value, and described overtemperature short switch is connected in parallel on the two ends of described PTC heater.
2. electric heater according to claim 1, is characterized in that, described overtemperature short switch is the thermal switch with mechanical contact.
3. electric heater according to claim 1, it is characterized in that, described overtemperature short switch comprises temperature sensor, controller and electric-controlled switch, described temperature sensor is electrically connected with described controller, described controller is electrically connected with described electric-controlled switch, described electric-controlled switch is connected in described control loop, and described temperature sensor is arranged near described PTC heater.
4. electric heater according to claim 1, is characterized in that, described circuit protecting switch is fuse or air switch.
5. electric heater according to claim 1, is characterized in that, described attemperating unit is the thermal switch with mechanical contact.
6. electric heater according to claim 1, it is characterized in that, described attemperating unit comprises temperature sensor, controller and electric-controlled switch, described temperature sensor is electrically connected with described controller, described controller is electrically connected with described electric-controlled switch, described electric-controlled switch is connected in described control loop, and described temperature sensor is arranged near described PTC heater.
7. the electric heater according to claim 3 or 6, is characterized in that, described temperature sensor is semiconductor temperature sensor or resistance temperature detector or heat-sensitive type temperature sensor.
8. electric heater according to claim 1, is characterized in that, described circuit switch is relay or automatically controlled semiconductor switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666681.0U CN204305376U (en) | 2014-11-10 | 2014-11-10 | A kind of PTC electric heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420666681.0U CN204305376U (en) | 2014-11-10 | 2014-11-10 | A kind of PTC electric heater |
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| Publication Number | Publication Date |
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| CN204305376U true CN204305376U (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420666681.0U Active CN204305376U (en) | 2014-11-10 | 2014-11-10 | A kind of PTC electric heater |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416940A (en) * | 2015-11-30 | 2016-03-23 | 芜湖成德龙过滤设备有限公司 | Goods shelf convenient to clean |
| CN108901087A (en) * | 2018-06-12 | 2018-11-27 | 方碧水 | A kind of dedicated explosion-protection equipment of heater |
| CN108973890A (en) * | 2017-05-30 | 2018-12-11 | 罗伯特·博世有限公司 | The method of the failure as caused by temperature for the component in pre- anti-vehicle |
| CN109062278A (en) * | 2018-05-23 | 2018-12-21 | 浙江欧兰顿电器科技有限公司 | A kind of control method of PTC constant temperature warming core constant temperature warming |
| CN112793383A (en) * | 2020-12-31 | 2021-05-14 | 镇江海姆霍兹传热传动***有限公司 | Electric vehicle and electric heating device thereof |
-
2014
- 2014-11-10 CN CN201420666681.0U patent/CN204305376U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105416940A (en) * | 2015-11-30 | 2016-03-23 | 芜湖成德龙过滤设备有限公司 | Goods shelf convenient to clean |
| CN108973890A (en) * | 2017-05-30 | 2018-12-11 | 罗伯特·博世有限公司 | The method of the failure as caused by temperature for the component in pre- anti-vehicle |
| CN108973890B (en) * | 2017-05-30 | 2023-10-31 | 罗伯特·博世有限公司 | Method for preventing temperature-induced malfunctions of components in a vehicle |
| CN109062278A (en) * | 2018-05-23 | 2018-12-21 | 浙江欧兰顿电器科技有限公司 | A kind of control method of PTC constant temperature warming core constant temperature warming |
| CN108901087A (en) * | 2018-06-12 | 2018-11-27 | 方碧水 | A kind of dedicated explosion-protection equipment of heater |
| CN112793383A (en) * | 2020-12-31 | 2021-05-14 | 镇江海姆霍兹传热传动***有限公司 | Electric vehicle and electric heating device thereof |
| CN112793383B (en) * | 2020-12-31 | 2022-03-04 | 镇江海姆霍兹传热传动***有限公司 | Electric vehicle and electric heating device thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 441100 Xiangyang City, Hubei province high tech Zone, East Jin Road, No. 1 (old fire brigade, floor 4) Patentee after: Hubei Yi Jia Science and Technology Ltd. Address before: 441100 Xiangyang City, Hubei province high tech Zone, East Jin Road, No. 1 (old fire brigade, floor 4) Patentee before: XIANGYANG YIJIA ELECTRICAL TECHNOLOGY CO., LTD. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200720 Address after: 441004 unit 6, unit 1, building 4, Jinxiu Tianchi yulanyuan, high tech Zone, Xiangyang City, Hubei Province Patentee after: Hubei Hongfei Electronic Technology Co., Ltd Address before: 441100 Xiangyang City, Hubei province high tech Zone, East Jin Road, No. 1 (old fire brigade, floor 4) Patentee before: HUBEI YIJIA TECHNOLOGY Co.,Ltd. |